<?php
header('Access-Control-Allow-Origin: http://www.jc-jt.com'); //设置http://www.jc-jt.com允许跨域访问
header('Access-Control-Allow-Headers: X-Requested-With,X_Requested_With'); //设置允许的跨域header
//crossDomain(array('http://www.jc-jt.com'));
date_default_timezone_set("Asia/Chongqing");
error_reporting(E_ERROR);
header("Content-Type: text/html; charset=utf-8");
$CONFIG = json_decode(preg_replace("/\/\*[\s\S]+?\*\//", "", file_get_contents("config.json")), true);
$action = $_GET['action'];

switch ($action) {
    case 'config':
        $result =  json_encode($CONFIG);
        break;

    /* 上传图片 */
    case 'uploadimage':
    /* 上传涂鸦 */
    case 'uploadscrawl':
    /* 上传视频 */
    case 'uploadvideo':
    /* 上传文件 */
    case 'uploadfile':
        $result = include("action_upload.php");
        break;

    /* 列出图片 */
    case 'listimage':
        $result = include("action_list.php");
        break;
    /* 列出文件 */
    case 'listfile':
        $result = include("action_list.php");
        break;

    /* 抓取远程文件 */
    case 'catchimage':
        $result = include("action_crawler.php");
        break;

    default:
        $result = json_encode(array(
            'state'=> '请求地址出错'
        ));
        break;
}

/* 输出结果 */
if (isset($_GET["callback"])) {
    if (preg_match("/^[\w_]+$/", $_GET["callback"])) {
        echo htmlspecialchars($_GET["callback"]) . '(' . $result . ')';

    } else {
        echo json_encode(array(
            'state'=> 'callback参数不合法'
        ));
    }
}else if(!empty($_REQUEST['issimpleupload'])){
    header("location:http://www.jc-jt.com/sycx/result.php?result=".urlencode($result));   //这步比较难以理解  
} else {
    echo $result;
}

function crossDomain($allowOrigin=array()) {
    //跨域访问的时候才会存在此字段
    $origin = isset($_SERVER['HTTP_ORIGIN']) ? $_SERVER['HTTP_ORIGIN'] : '';
    if(in_array($origin, $allowOrigin)){
        header('Access-Control-Allow-Origin:'.$origin);
        header('Access-Control-Allow-Methods:POST,GET');
        header('Access-Control-Allow-Headers:x-requested-with,content-type');
    }
}